Prism of Lyra
Name of a book written by Lyssa Royal & Keith Priest. In it they give a short summary of human galactic history.
The title of the book refers to "the archetypal idea of the entrance of consciousness into this reality. For Earth's galactic family the entrance point exists within the Lyran system. As consciousness / energy emerged, it fragmented into seven density frequencies, much as a prism would fragment light into seven visible colors." (PoL)